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Niki
Niki
Level I

Chart is showing data I've excluded and not using data that should be included.

Created: Oct 8, 2020 11:06 AM  |  Last Modified: Jun 10, 2023 4:20 PM (1195 views)

I've excluded data from my table and when I'm making an xbar control chart, JMP is pulling data that's one or two data points off from what I've hidden and excluded. I've highlighted the first and last points so you can see the data JMP is using to create the points. 

 

I dont think the colors have anything to do with it. The charts were displaying the same information before I added the colors. 

 

I'm a basic user, so I'm not into scripting and all that! 

Should be running JMP 14.3.0

 

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2 REPLIES 2
statman
Super User statman
Super User

Re: Chart is showing data I've excluded and not using data that should be included.

Oct 8, 2020 11:37 AM (1185 views)  |  Posted in reply to message from Niki 10-08-2020

It is difficult to understand the issue with just the images you posted.  There does not appear to be any averages plotted at all?  It also looks like your subgrouping is questionable.  If you attach the JMP table (go ahead and modify it to leave out sensitive columns) we can have a better look.  I do see JMP is reporting that 154 samples were excluded.

"All models are wrong, some are useful" G.E.P. Box
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tonya_mauldin
Staff tonya_mauldin
Staff

Re: Chart is showing data I've excluded and not using data that should be included.

Oct 9, 2020 11:07 AM (1123 views)  |  Posted in reply to message from Niki 10-08-2020

You are using the legacy control chart.  In the documentation, you will find the following: "Hide and Exclude operate only on the row state of the first observation in the sample. For example, if the second observation in the sample is hidden, but the first observation is not hidden, the sample still appears on the chart."  Because the first observation in the sample is not hidden or excluded, all observations in that sample are used.  I suggest using the more modern Control Chart Builder platform instead.